Music Theory Vol.4: Mastering Extended Chords

Define intervals as the distance between two notes and study harmonic and melodic intervals; memorize major and minor thirds (two tones versus one and a half) to construct extended chords.

Explore three-note chords by building triads from a root with the third and fifth. Memorize the major, minor, diminished, and augmented structures and their thirds.

Learn four-note chords built by stacking thirds from the root, including major seventh, dominant seventh, minor seventh, minor major seventh, and diminished seventh chords.

Explore building 9th chords as five-note structures built from thirds, and quickly identify the root, third, fifth, seventh, and ninth notes using letter names or a keyboard view.

Identify the ninth of any chord quickly by treating the ninth as the second above the root, and practice with chords like C, G, D, A to build confidence.

Master 11th chords by learning the six-note structure—root, 3rd, 5th, 7th, 9th, 11th—and practice rapid note recognition with root-position examples.

Master a quick method to identify the 11th in any chord by treating it as a fourth from the root, with practice across multiple roots.

Master seven-note 13th chords by naming thirds in ascending order from the root, and practice fluently with the triad foundation while handling ninth, eleventh, and thirteenth extensions.

Master a quick tip to identify the 13th in any 13th chord by counting ascendant sixths or the third-to-sixth method. Practice from any root to find the third and sixth.

Discover how raising the fifth of a major seventh chord creates an augmented chord, and follow a step-by-step construction to Maj7#5 with interval changes explained.

Explore the maj7b5 chord by starting from a C major seventh and adding a flat fifth on G, producing its distinctive sound.

Identify the major ninth chord and its components—major triad, major seventh, and major ninth—by analyzing intervals such as major third and perfect fifth and how notes are written.

Explore the maj11 chord in C major by building from major seven and major nine, identifying the major third, perfect eleventh, and absence of accidentals.

Discover how to build and voice the maj9#11 chord by raising the eleventh to a sharp eleventh, detailing tones: major third, perfect fifth, major seventh, major ninth, and sharp eleventh.

Master the major 13 sharp 11 chord by building from the major third, perfect fifth, major seventh, and major ninth, incorporating the F sharp alteration and the eleventh note.

Reflect on your progress, share feedback to improve course content, and commit to consistent practice of piano and ear training exercises to master the material.

learn the dominant seventh suspended second chord, where the third is replaced by the second, and practice the intervals of major second, perfect fifth, and minor seventh.

Explore the dominant seventh flat five chord, using a C with major third, diminished fifth, and minor seventh, and see how lowering the fifth creates the 7b5 sound.

Explore the dominant seventh chord and its sharp five variant by raising the fifth of a C dominant seventh from G to G sharp, illustrating two naming methods.

Explore the 7#9 chord, a dominant seven with a raised ninth, by raising the ninth a half step and using the notes shown.

Explore the 7b9 chord, a dominant seventh with a flat ninth, built on a major triad; this dissonant sonority arises from a lowered ninth interval.

This lecture covers the 9#11 chord as a dominant seventh with a minor seventh and a major ninth. It shows raising the eleventh by a half step.

Explore the dominant seventh chord built on C, with sharp nine and sharp eleven extensions (7#9#11), including correct accidentals and practical practice to master this extended chord.

Learn the 7b9#11 dominant seventh chord, built on a major chord with the flat nine and sharp eleven, including careful spelling of b9 and #11 and their intervals.

Explore the C thirteenth sharp eleven, a dominant seventh with major nine, augmented eleven, and major thirteen. Hear the tones C E G B♭ D F♯ A.

explains the 13b9#11 chord as a major core with a dominant seventh, then adds flat nine, sharp eleven, and major thirteenth, highlighting the interplay of flats and accidentals.

Learn how to build the C13#9#11 chord by raising the ninth and eleventh by half steps and adding the major thirteenth in a dominant setting.

Explore the C dominant seventh chord with sharp nine, sharp eleven, and flat thirteen, and learn how these altered extensions shape the 7#9#11b13 harmony.

Explore the m9 chord in c minor, adding the minor seventh and ninth with b flat, e flat, and d. Trace the interval sequence: minor third, perfect fifth, minor seventh.

Explore the m9b5 chord, a minor nine flat five, voiced as a minor ninth with a flat fifth or as a diminished chord with a minor seventh and major ninth.

Explore how to construct the m7b5b9 chord from a C minor foundation by lowering the fifth and ninth, forming a diminished core with a minor seventh and flat nine.

Explore the m11 chord by building a C minor 11th: add a minor seventh, major ninth, and perfect eleventh over a minor triad, with careful handling of Eb.

Explain the m11b5 chord, show that a minor chord with flat five becomes diminished, and illustrate with C minor 11th flat 5 and its notes e-flat, g-flat, b-flat, d.

Explore the minor eleven flat five flat nine chord, a diminished minor chord with a flat nine and a perfect eleventh, detailing its notes and intervals.

Explore the c minor 13th chord, detailing its intervals—minor seventh, major nine, perfect eleventh, and major thirteenth. Note the e-flat and b-flat adjustments when building the chord.

Analyze the m13b5b9 chord, a minor thirteen flat five flat nine, including its notes (E flat, G flat, B flat, D) and its interval structure.

Explore how the m11b5b9b13 chord is built in C minor, with flat five, flat nine, and flat thirteen extensions, and learn the related notes through guided practice.

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